[PATCH 05/22] KVM: MMU: Introduce get_cr3 function pointer
in [Kernel]
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From: Joerg Roedel on 27 Apr 2010 06:50 This function pointer in the MMU context is required to implement Nested Nested Paging. Signed-off-by: Joerg Roedel <joerg.roedel(a)amd.com> --- arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/mmu.c | 9 ++++++++- arch/x86/kvm/paging_tmpl.h | 4 ++-- 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 5c74269..47d1755 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -234,6 +234,7 @@ struct kvm_pio_request { struct kvm_mmu { void (*new_cr3)(struct kvm_vcpu *vcpu); void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long root); + unsigned long (*get_cr3)(struct kvm_vcpu *vcpu); int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); void (*free)(struct kvm_vcpu *vcpu); gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva, u32 access, diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index f1fac9a..a25a72e 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2053,7 +2053,7 @@ static int mmu_alloc_roots(struct kvm_vcpu *vcpu) int direct = 0; u64 pdptr; - root_gfn = vcpu->arch.cr3 >> PAGE_SHIFT; + root_gfn = vcpu->arch.mmu.get_cr3(vcpu) >> PAGE_SHIFT; if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) { hpa_t root = vcpu->arch.mmu.root_hpa; @@ -2236,6 +2236,11 @@ static void paging_new_cr3(struct kvm_vcpu *vcpu) mmu_free_roots(vcpu); } +static unsigned long get_cr3(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.cr3; +} + static void inject_page_fault(struct kvm_vcpu *vcpu, u64 addr, u32 err_code) @@ -2387,6 +2392,7 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu) context->root_hpa = INVALID_PAGE; vcpu->arch.mmu.direct_map = true; vcpu->arch.mmu.set_cr3 = kvm_x86_ops->set_tdp_cr3; + vcpu->arch.mmu.get_cr3 = get_cr3; if (!is_paging(vcpu)) { context->gva_to_gpa = nonpaging_gva_to_gpa; @@ -2427,6 +2433,7 @@ static int init_kvm_softmmu(struct kvm_vcpu *vcpu) vcpu->arch.mmu.base_role.cr4_pae = !!is_pae(vcpu); vcpu->arch.mmu.direct_map = false; vcpu->arch.mmu.set_cr3 = kvm_x86_ops->set_cr3; + vcpu->arch.mmu.get_cr3 = get_cr3; return r; } diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index b07cec6..802c513 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -126,7 +126,7 @@ static int FNAME(walk_addr)(struct guest_walker *walker, fetch_fault); walk: walker->level = vcpu->arch.mmu.root_level; - pte = vcpu->arch.cr3; + pte = vcpu->arch.mmu.get_cr3(vcpu); #if PTTYPE == 64 if (vcpu->arch.mmu.root_level == PT32E_ROOT_LEVEL) { pte = kvm_pdptr_read(vcpu, (addr >> 30) & 3); @@ -137,7 +137,7 @@ walk: } #endif ASSERT((!is_long_mode(vcpu) && is_pae(vcpu)) || - (vcpu->arch.cr3 & CR3_NONPAE_RESERVED_BITS) == 0); + (vcpu->arch.mmu.get_cr3(vcpu) & CR3_NONPAE_RESERVED_BITS) == 0); pt_access = ACC_ALL; -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |